when a guy is seconds away from ejaculation and is interupted (relative walks in, girl starts crying) and ejaculation is delayed and in a fevered attempt he resumes the process that brought him to ejaculation and its very poor ejaculation.

dude, i was fucking carrie, then her sister walked in, and she starred at me and left, so i kept jerking off but it was a spud dud.. so i went and raped carrie's sister.